(Innate): Upon dying, Kog'Maw starts a chain reaction in his body which allows him to move faster for 4 seconds and detonate at the end of the duration, dealing 100 + (25 x level) true damage to surrounding enemies.

Icathian Surprise is a passive ability that activates whenever Kog'Maw dies, making him untargetable for 4 seconds; during this time Kog'Maw cannot autoattack, use abilities or summoner spells, but he can move and is granted bonus movement speed. After this duration, Kog'Maw explodes and deals true damage to all enemy units in a radius around him.

(Active): For 8 seconds, Kog'Maw's autoattacks gain range and deal additional magic damage which is equal to a percentage of the target's max health. The damage caps at 100 against minions and monsters.

(Active): Kog'Maw launches a living artillery shell to a target location at a great distance which falls after a 0.6 second delay, dealing magic damage to all enemies hit and revealing them for 4 seconds. It deals 2.25 times as much base damage to champions.

Each subsequent Living Artillery in the next 6 seconds after a cast will cost 40 additional mana, capping at 400 per cast.

Living Artillery is a ground targeted area of effect ability that, after a 0.6 second delay, causes a barrage of ooze to fall on the target area, dealing magic damage on impact and revealing enemy units hit for 4 seconds. Living Artillery deals bonus damage to champions. Subsequent Living Artillery casts within a short duration will have a larger mana cost, as indicated by a stacking buff counter placed on Kog'Maw.